Toshiba H1 Series - Manual (Page 491)

TMP92CZ26A
92CZ26A-488
Transmit/Receive
When transmitting or receiving, write <FDPXE>= “1”
Writing <FDPXE>= “1” first, and SPICT<RXE>= “1” and keep waiting state for starting
UNIT receiving. When writing SPICT<RXE>= “1”after <ALGNEN>= “1”, receiving does not
start right away. This is because the data to transmit at the same time has not been prepared.
Transmit/receive start when writing the data to (SPITD) register with the condition <TXE>=
“1”.
The waveform of each transmit/receive operation is as follows;
Note: If transmit/receive are not operated simultaneously, please communicate with the condition <FDPXE>=”0”.
Figure 3.17.8 Transmit/Receive
Transmitter
SPCLK output
SPDI input
Bit1 Bit2 Bit3 Bit4 Bit0
LSB
Bit5 Bit6 Bit7
SPCLK output
SPDO output
Receiver
Bit1 Bit2 Bit4
LS
Start
receiving
Start
transmitting